TXH0137D-Q1 - 7-Bit 30V Level Translator | Texas Instruments
MPN: TXH0137D-Q1 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0.98 | $0.98 |
| 10 | $0.92 | $9.20 |
| 100 | $0.82 | $82.00 |
| 500 | $0.74 | $370.00 |
| 1,000 | $0.68 | $680.00 |
TXH0137D-Q1 Overview
A voltage-level translator is a type of logic IC that converts digital signals from one voltage domain to another, sitting within the broader hierarchy of logic ICs, interface ICs, and semiconductors. Level translators are essential whenever chips operating at different supply rails - for example a 3.3V microcontroller and a 12V industrial sensor - must exchange signals safely. Fixed-direction translators like this one assign a permanent direction to each channel, avoiding the overhead and ambiguity of direction-control pins.
Key features include 7 translation channels in a single package, open-drain outputs that support voltages up to 30V, and output currents up to 100mA per channel. The inverted output polarity allows the device to double as a level-shifting buffer-inverter, and the open-drain structure lets designers pull outputs to any rail within the 30V rating. As a Q1 device, it carries TI's automotive qualification for -40C to +125C operation.
On the technical side, because output currents of up to 100mA per channel are very high for a level translator, the outputs are more susceptible to large overshoot caused by reactive loads. To address this, the TXH0137D-Q1 integrates clamping overshoot-protection diodes on its outputs, improving robustness against inductive and capacitive ringing in automotive wiring environments. Additionally, the open-drain outputs can be tied (paralleling) together to achieve higher aggregate current capability, a flexibility not found in push-pull translators.
Typical applications include automotive body electronics and gateways, level-shifting between low-voltage MCUs and high-voltage sensors or actuators, industrial PLC I/O modules, and driving relays, LEDs, or solenoids that require more than the few milliamps a standard logic gate can source. The 30V output rating and 100mA drive make it a direct fit for 12V and 24V automotive rail signaling.
A key design consideration: with open-drain outputs, external pull-up resistors are required, and their value sets both the output high level and the rise time. Size pull-ups to balance current consumption against edge speed, and rely on the integrated clamp diodes for overshoot events rather than external TVS in most designs.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for TXH0137D-Q1 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
TXH0137D
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
TXH0137D-Q1 Maximum Ratings & Electrical Characteristics
| Function | Voltage-Level Translator |
| Bits per Channel | 7 |
| Translation Direction | Fixed direction |
| Output Type | Open drain, inverted |
| Maximum Output Voltage | 30 V |
| Maximum Output Current per Channel | 100 mA |
| Supply Type | Single supply |
| Overshoot Protection | Integrated clamp diodes on outputs |
| Operating Temperature Range | -40C to +125C |
| Automotive Qualification | AEC-Q100 (Q1) |
| Package | 14-TSSOP (PW) |
| Mounting Type | Surface Mount |
| Orderable Part Number | PTXH0137DQPWRQ1 |
| Packaging | Tape & Reel (PWR suffix) |
TXH0137D-Q1 14-tssop (pw) Pin Configuration Guide
Pin configuration for TXH0137D-Q1 (14-tssop (pw) package). This digital IC includes GPIO, communication interfaces (UART, SPI, I2C), and power pins. Refer to the manufacturer datasheet for alternate pin functions and configuration options. Essential for embedded system design and PCB layout.
No detailed pinout data available for TXH0137D-Q1.
Refer to the datasheet for full pin configuration.
Typical Applications
TXH0137D-Q1 is suitable for 6 applications: Automotive Body Electronics, Level Shifting Between MCU and High-Voltage Sensors, Industrial PLC I/O Modules, Relay and Solenoid Drive Interface, LED Driving and Indication, Automotive Gateways and Communication Modules.
Automotive Body Electronics
In body control modules, door modules, and lighting controllers, the TXH0137D-Q1 translates low-voltage MCU logic (3.3V or 5V) to 12V automotive rails using its 30V-rated open-drain outputs. The 100mA per-channel drive lets it directly drive small relays, indicator LEDs, or lamp diagnostics without external driver stages, reducing BOM count. Its AEC-Q100 qualification and -40C to +125C rating satisfy automotive temperature requirements, while integrated overshoot clamp diodes protect against the inductive overshoot common in automotive wiring harnesses, improving system robustness in harsh electrical environments.
Recommended
Level Shifting Between MCU and High-Voltage Sensors
Many industrial and automotive sensors operate at 12V or 24V while host microcontrollers run at 3.3V or 5V. The TXH0137D-Q1 bridges this gap with 7 fixed-direction channels: MCU-side inputs accept low-voltage logic, and outputs pull up to the sensor rail up to 30V. Because outputs are open drain, the designer chooses the pull-up rail freely and controls edge speed via resistor sizing. The inverted output must be handled in software or by a following inverter stage, a minor trade-off against the robustness and high drive current gained.
Recommended
Industrial PLC I/O Modules
Programmable logic controller I/O cards frequently must interface 5V logic to 24V field signals. The TXH0137D-Q1 provides 7 channels of fixed-direction translation in a compact 14-TSSOP, letting one device shift a parallel bus or multiple discrete I/O points simultaneously. The 30V output rating covers 24V industrial rails with headroom, and the 100mA open-drain outputs can sink indicator LEDs or drive optocoupler inputs directly. The integrated overshoot clamps absorb inductive kick from long field wiring, improving reliability in factory environments where cable inductance causes voltage ringing on transitions.
Recommended
Relay and Solenoid Drive Interface
The TXH0137D-Q1's 100mA open-drain outputs can directly drive small relays, low-current solenoids, or the input stage of larger drivers, all while level-shifting from MCU logic. Paralleling multiple channels increases aggregate sink current since open-drain outputs cannot contend, a flexibility push-pull translators lack. The integrated clamp diodes address the inductive overshoot that relay and solenoid coils generate at turn-off, reducing the need for external transient suppression in many designs. Fixed-direction operation simplifies the interface: no direction-control pins or firmware management are required for the drive path.
Recommended
LED Driving and Indication
For status LEDs, backlight strings, or high-current indicator arrays on 12V/24V rails, the TXH0137D-Q1 offers a compact single-device solution: seven inverted open-drain outputs each sink up to 100mA, enough for most high-brightness indicators directly. Pull-ups are not needed for LED sinking (the LED and series resistor connect from the rail to the output), and outputs can be paralleled for higher-current segments. The 14-TSSOP footprint keeps board area small, and automotive Q1 qualification permits use in vehicle interior and exterior lighting control boards where -40C to +125C operation is required.
Recommended
Automotive Gateways and Communication Modules
In-vehicle gateways must move enable, status, and configuration signals between low-voltage SoC/MCU domains and 12V-domain transceivers, power switches, and diagnostics circuits. The TXH0137D-Q1's 7 channels handle a cluster of such signals in one 14-TSSOP package, with 30V output tolerance providing margin on 12V rails. Open-drain outputs support wired-OR signaling conventions common in status lines, and the integrated clamp diodes protect against overshoot from the reactive vehicle harness. Fixed-direction translation suits gateway signal maps where each net's direction is defined by the system architecture and never changes at runtime.
Recommended
Recommended Products Summary
Engineering reference data for TXH0137D-Q1 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TXH0137D |
|---|---|---|
| Package | 14-TSSOP (PW) | 14-TSSOP (PW) - same |
| Brand | Texas Instruments | Texas Instruments |
| Number of Channels | 7 | 7 |
| Max Output Voltage | 30 V | 30 V |
| Max Output Current per Channel | 100 mA | 100 mA |
| Output Type | Open drain, inverted | Open drain, inverted |
| Automotive Qualification | Yes (AEC-Q100, Q1) | No (standard grade) |
| Overshoot Clamp Diodes | Yes (integrated) | Yes (integrated) |
Key Differentiators
- Automotive AEC-Q100 qualification (vs TXH0137D)
- 30V open-drain output rating with 100mA drive (vs CD4010B)
- Integrated overshoot clamp diodes (vs generic level translators)
Design Notes
Each TXH0137D-Q1 output is open drain, so route a pull-up resistor from every used output to its target rail (up to 30V). Size the resistor so the sink current stays within the 100mA per-channel rating: at a 12V pull-up, keep pull-up resistance at or above roughly 120 ohms at full sink to preserve margin. Lower resistances give faster rising edges but higher static current - for status signals, 4.7k to 10k is typical; for faster edges use 1k and verify power.
The TXH0137D-Q1 inverts: a logic high on the input produces a pulled-low output. Forgetting this inversion in firmware is the most common integration error. Also remember that TI warns the high-current outputs (up to 100mA) are more susceptible to overshoot from reactive loads; while the device integrates clamp protection diodes, systems driving long harnesses or large inductive loads should still verify overshoot remains within the clamp capability on the bench.
Estimated: when paralleling channels to increase sink current, total device dissipation is the sum of each channel's sink current times its output low voltage (VOL). For example, four channels sinking 100mA at an assumed VOL of 0.5V dissipate about 0.2W combined - well within the 14-TSSOP thermal capability, but verify VOL on the datasheet curves at your actual current to confirm. Derate for -40C to +125C automotive ambient operation.
Compliance Information
Q1 suffix denotes TI automotive qualification per AEC-Q100 (stated in product description as an automotive device rated -40C to +125C). RoHS/REACH/lead-free status not stated in provided web data - verify on TI.com product page.
